ref: move jnzero16 function into a class (Bits16)

Author: bartsanchez

src/arch/z80/backend/_16bit.py

@@ -1141,18 +1141,18 @@ def fparam16(cls, ins: Quad) -> list[str]:
         """
         return Bits16.get_oper(ins[1])
 
+    @classmethod
+    def jnzero16(cls, ins: Quad) -> list[str]:
+        """Jumps if top of the stack (16bit) is != 0 to arg(1)"""
+        value = ins[1]
+        if is_int(value):
+            if int(value) != 0:
+                return ["jp %s" % str(ins[2])]  # Always true
+            else:
+                return []
 
-def _jnzero16(ins: Quad) -> list[str]:
-    """Jumps if top of the stack (16bit) is != 0 to arg(1)"""
-    value = ins[1]
-    if is_int(value):
-        if int(value) != 0:
-            return ["jp %s" % str(ins[2])]  # Always true
-        else:
-            return []
-
-    output = Bits16.get_oper(value)
-    output.append("ld a, h")
-    output.append("or l")
-    output.append("jp nz, %s" % str(ins[2]))
-    return output
+        output = Bits16.get_oper(value)
+        output.append("ld a, h")
+        output.append("or l")
+        output.append("jp nz, %s" % str(ins[2]))
+        return output

src/arch/z80/backend/main.py

@@ -26,10 +26,7 @@
 # 16 bit comparison functions
 # 16bit parameters and function call instrs
 # 16 bit arithmetic functions
-from ._16bit import (
-    Bits16,
-    _jnzero16,
-)
+from ._16bit import Bits16
 
 # 32 bit bitwise operations
 # 32 bit shift operations
@@ -316,8 +313,8 @@ def _set_quad_table(self):
             ICInstruction.JZEROSTR: ICInfo(2, String.jzerostr),  # if str is NULL or len(str) == 0, jmp LABEL
             ICInstruction.JNZEROI8: ICInfo(2, Bits8.jnzero8),  # if X != 0 jmp LABEL
             ICInstruction.JNZEROU8: ICInfo(2, Bits8.jnzero8),  # if X != 0 jmp LABEL
-            ICInstruction.JNZEROI16: ICInfo(2, _jnzero16),  # if X != 0 jmp LABEL
-            ICInstruction.JNZEROU16: ICInfo(2, _jnzero16),  # if X != 0 jmp LABEL
+            ICInstruction.JNZEROI16: ICInfo(2, Bits16.jnzero16),  # if X != 0 jmp LABEL
+            ICInstruction.JNZEROU16: ICInfo(2, Bits16.jnzero16),  # if X != 0 jmp LABEL
             ICInstruction.JNZEROI32: ICInfo(2, Bits32.jnzero32),  # if X != 0 jmp LABEL (32bit, fixed)
             ICInstruction.JNZEROU32: ICInfo(2, Bits32.jnzero32),  # if X != 0 jmp LABEL (32bit, fixed)
             ICInstruction.JNZEROF16: ICInfo(2, Fixed16.jnzerof16),  # if X != 0 jmp LABEL (32bit, fixed)